login
A321230
Number of set partitions of [n^2] into n n-element subsets having the same sum.
2
1, 1, 1, 2, 392, 3245664, 6534071578530
OFFSET
0,4
FORMULA
a(n) = A203986(n,n).
EXAMPLE
a(0) = 1: empty.
a(1) = 1: 1.
a(2) = 1: 14|23.
a(3) = 2: 168|249|357, 159|267|348.
CROSSREFS
Main diagonal of A203986.
Sequence in context: A343698 A176937 A092701 * A281322 A360702 A249359
KEYWORD
nonn,more
AUTHOR
Alois P. Heinz, Oct 31 2018
STATUS
approved